1 | /* |
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2 | * Object Handler Initialization per Object Class |
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3 | * |
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4 | * COPYRIGHT (c) 1989-2011. |
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5 | * On-Line Applications Research Corporation (OAR). |
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6 | * |
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7 | * The license and distribution terms for this file may be |
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8 | * found in the file LICENSE in this distribution or at |
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9 | * http://www.rtems.com/license/LICENSE. |
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10 | */ |
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11 | |
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12 | #if HAVE_CONFIG_H |
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13 | #include "config.h" |
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14 | #endif |
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15 | |
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16 | #include <rtems/system.h> |
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17 | #include <rtems/score/address.h> |
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18 | #include <rtems/score/chain.h> |
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19 | #include <rtems/score/object.h> |
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20 | #if defined(RTEMS_MULTIPROCESSING) |
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21 | #include <rtems/score/objectmp.h> |
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22 | #endif |
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23 | #include <rtems/score/thread.h> |
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24 | #include <rtems/score/wkspace.h> |
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25 | #include <rtems/score/sysstate.h> |
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26 | #include <rtems/score/isr.h> |
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27 | |
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28 | /* |
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29 | * _Objects_Initialize_information |
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30 | * |
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31 | * This routine initializes all object information related data structures. |
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32 | * |
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33 | * Input parameters: |
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34 | * information - object information table |
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35 | * maximum - maximum objects of this class |
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36 | * size - size of this object's control block |
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37 | * is_string - true if names for this object are strings |
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38 | * maximum_name_length - maximum length of each object's name |
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39 | * When multiprocessing is configured, |
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40 | * supports_global - true if this is a global object class |
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41 | * extract_callout - pointer to threadq extract callout |
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42 | * |
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43 | * Output parameters: NONE |
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44 | */ |
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45 | |
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46 | void _Objects_Initialize_information( |
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47 | Objects_Information *information, |
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48 | Objects_APIs the_api, |
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49 | uint16_t the_class, |
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50 | uint32_t maximum, |
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51 | uint16_t size, |
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52 | bool is_string, |
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53 | uint32_t maximum_name_length |
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54 | #if defined(RTEMS_MULTIPROCESSING) |
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55 | , |
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56 | bool supports_global, |
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57 | Objects_Thread_queue_Extract_callout extract |
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58 | #endif |
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59 | ) |
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60 | { |
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61 | static Objects_Control *null_local_table = NULL; |
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62 | uint32_t minimum_index; |
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63 | Objects_Maximum maximum_per_allocation; |
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64 | #if defined(RTEMS_MULTIPROCESSING) |
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65 | uint32_t index; |
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66 | #endif |
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67 | |
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68 | information->the_api = the_api; |
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69 | information->the_class = the_class; |
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70 | information->size = size; |
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71 | information->local_table = 0; |
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72 | information->inactive_per_block = 0; |
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73 | information->object_blocks = 0; |
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74 | information->inactive = 0; |
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75 | #if defined(RTEMS_SCORE_OBJECT_ENABLE_STRING_NAMES) |
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76 | information->is_string = is_string; |
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77 | #endif |
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78 | |
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79 | /* |
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80 | * Set the maximum value to 0. It will be updated when objects are |
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81 | * added to the inactive set from _Objects_Extend_information() |
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82 | */ |
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83 | information->maximum = 0; |
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84 | |
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85 | /* |
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86 | * Register this Object Class in the Object Information Table. |
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87 | */ |
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88 | _Objects_Information_table[ the_api ][ the_class ] = information; |
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89 | |
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90 | /* |
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91 | * Are we operating in limited or unlimited (e.g. auto-extend) mode. |
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92 | */ |
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93 | information->auto_extend = _Objects_Is_unlimited( maximum ); |
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94 | maximum_per_allocation = _Objects_Maximum_per_allocation( maximum ); |
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95 | |
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96 | /* |
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97 | * Unlimited and maximum of zero is illogical. |
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98 | */ |
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99 | if ( information->auto_extend && maximum_per_allocation == 0) { |
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100 | _Internal_error_Occurred( |
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101 | INTERNAL_ERROR_CORE, |
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102 | true, |
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103 | INTERNAL_ERROR_UNLIMITED_AND_MAXIMUM_IS_0 |
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104 | ); |
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105 | } |
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106 | |
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107 | /* |
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108 | * The allocation unit is the maximum value |
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109 | */ |
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110 | information->allocation_size = maximum_per_allocation; |
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111 | |
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112 | /* |
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113 | * Provide a null local table entry for the case of any empty table. |
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114 | */ |
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115 | information->local_table = &null_local_table; |
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116 | |
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117 | /* |
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118 | * Calculate minimum and maximum Id's |
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119 | */ |
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120 | minimum_index = (maximum_per_allocation == 0) ? 0 : 1; |
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121 | information->minimum_id = |
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122 | _Objects_Build_id( the_api, the_class, _Objects_Local_node, minimum_index ); |
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123 | |
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124 | /* |
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125 | * Calculate the maximum name length |
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126 | * |
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127 | * NOTE: Either 4 bytes for Classic API names or an arbitrary |
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128 | * number for POSIX names which are strings that may be |
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129 | * an odd number of bytes. |
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130 | */ |
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131 | |
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132 | information->name_length = maximum_name_length; |
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133 | |
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134 | _Chain_Initialize_empty( &information->Inactive ); |
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135 | |
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136 | /* |
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137 | * Initialize objects .. if there are any |
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138 | */ |
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139 | if ( maximum_per_allocation ) { |
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140 | /* |
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141 | * Always have the maximum size available so the current performance |
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142 | * figures are create are met. If the user moves past the maximum |
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143 | * number then a performance hit is taken. |
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144 | */ |
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145 | _Objects_Extend_information( information ); |
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146 | } |
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147 | |
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148 | /* |
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149 | * Take care of multiprocessing |
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150 | */ |
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151 | #if defined(RTEMS_MULTIPROCESSING) |
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152 | information->extract = extract; |
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153 | |
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154 | if ( (supports_global == true) && _System_state_Is_multiprocessing ) { |
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155 | |
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156 | information->global_table = |
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157 | (Chain_Control *) _Workspace_Allocate_or_fatal_error( |
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158 | (_Objects_Maximum_nodes + 1) * sizeof(Chain_Control) |
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159 | ); |
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160 | |
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161 | for ( index=1; index <= _Objects_Maximum_nodes ; index++ ) |
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162 | _Chain_Initialize_empty( &information->global_table[ index ] ); |
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163 | } |
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164 | else |
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165 | information->global_table = NULL; |
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166 | #endif |
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167 | } |
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